Adjusting The Radar Image - Lowrance Elite FS 7 User Manual

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Dual range
When connected to a radar with dual range capability, it is possible
to run the radar in Dual Range mode.
The radar appears in the radar sources menu as two virtual radar
sources A and B. Range and radar controls for each virtual radar
source are fully independent and the source can be selected for a
particular chart or radar panel in the same manner as dual radar
described in "Selecting the radar source" on page 132.
Ú Note:
Some controls that are related to physical properties of
the radar itself are not independent of source. These are Fast
Scan, Antenna Height and Bearing alignment.
MARPA is fully independent and up to 10 targets may be tracked for
each virtual radar source.
Up to two independent Guard Zones may also be defined for each
virtual radar source.

Adjusting the radar image

You may be able to improve the radar image by adjusting the radar
sensitivity, and by filtering out the random echoes from sea and
weather conditions.
You can adjust the image settings from the radar menu.
Menu options can vary depending on your radar's capability.
Radar modes
Use modes are available with preset control settings for different
environments. Not all modes are available for all radar transceivers.
Modes in dual ranges
When connected to a radar with dual range capability, it is possible
to run the radar in Dual Range mode.
Modes can be set independently for each range. For example, you
can have Offshore mode for range A and Weather mode for range B.
However, interaction between ranges occurs in some cases:
• When using Bird mode for both ranges, maximum range is
restricted to 24 NM and range resolution is reduced.
• Fast scan - The antenna rotation speed is set to the slower of the
two modes selected. For example, Fast Scan is disabled when
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